Tokens of popular projects are imitated by scammers to sell the fake tokens to victims. Fake tokens usually have a very similar name as the real one, e.g., UNI and UN1 or 1INCH and IINCH. Since everyone can list every token on a decentralized exchange the scammers create the tokens on a blockchain (usually the same one as the original token) and list them on a decentralized exchange. Scammer do not provide any or just provide a little liquidity. So, victims can buy the tokens bit they cannot sell them (see https://coinmarketcap.com/alexandria/article/how-to-identify-and-avoid-uniswap-scams and https://dappradar.com/blog/8-ways-to-check-if-its-a-token-scam).
